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Finding the Fourth Proportional to 610,638.64, 842,684.39 and 338,687.62

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Solution

The fourth proportional to 610,638.64, 842,684.39 and 338,687.62 is: 467,390.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,638.64 : 842,684.39 = 338,687.62 : x
  2. Step 2: Convert to fraction form
    610,638.64/842,684.39 = 338,687.62/x
  3. Step 3: Cross multiply
    610,638.64x = 842,684.39 × 338,687.62
  4. Step 4: Simplify right side
    610,638.64x = 285,406,768,766.81
  5. Step 5: Solve for x
    x = 285,406,768,766.81/610,638.64
  6. Step 6: Final answer
    x = 467,390.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.